(idiomatic, euphemistic) Buried six feet underground; not alive; dead.

(soccer) An enclosed area inside the penalty area, extending 6 yards (5.5 metres) from the goal, inside which a goal kick must be taken.

(idiomatic, colloquial) Thoroughly, completely, in every way imaginable.

(cricket) To score six points against (a bowler) by hitting the ball over the boundary. / (idiomatic) To affect in a devastating way by some unexpected news. / To hit another person very hard.

Alternative form of Joe Sixpack

(idiomatic) Two equivalent choices or situations.

Alternative form of sixpenny nail

Alternative form of sixpenny nail

(Australia, New Zealand, historical) The last-minute rush to buy alcohol at a bar before it closed at 6pm.

(geometry) A configuration of 30 points and 12 lines. The lines can be partitioned into two subsets of six: each line is disjoint from (skew with) the lines in its own subset of six lines, and intersects all but one of the lines in the other subset of six lines. Each of the 12 lines of the configuration contains five intersection points, and each of these 30 intersection points belongs to exactly two lines, one from each subset.